: str_replace(): Passing null to parameter #2 ($replace) of type array|string is deprecated in
trait WPCF7_ConfigValidator_Messages {
* Runs error detection for the messages section.
public function validate_messages() {
$messages = (array) $this->contact_form->prop( 'messages' );
isset( $messages['captcha_not_match'] ) and
! wpcf7_use_really_simple_captcha()
unset( $messages['captcha_not_match'] );
foreach ( $messages as $key => $message ) {
$section = sprintf( 'messages.%s', $key );
if ( $this->supports( 'html_in_message' ) ) {
if ( $this->detect_html_in_message( $section, $message ) ) {
$this->add_error( $section, 'html_in_message',
'message' => __( "HTML tags are used in a message.", 'contact-form-7' ),
$this->remove_error( $section, 'html_in_message' );
* Detects errors of HTML uses in a message.
* @link https://contactform7.com/configuration-errors/html-in-message/
public function detect_html_in_message( $section, $content ) {
$stripped = wp_strip_all_tags( $content );
if ( $stripped !== $content ) {